Cellular Respiration
Your Acetyl CoA molecule enters the Citric Acid Cycle (Kreb's Cycle). Your molecule is attached to previous metabolites of the cycle to create a Citrate molecule. You go through one sequence of the cycle, producing 3 NADH and 1 FADH2 to be used in further steps of cellular respiration. However, as a Carbon atom, the Citric Acid Cylce is as far as you go. You can either exit the cellular respiration process as one of two CO2 molecules produced per sequence or continue around the cycle as part of one of the metabolites.